package com.xcc.core.netty.server;


import static io.netty.handler.codec.http.HttpHeaders.isKeepAlive;
import static io.netty.handler.codec.http.HttpHeaders.setContentLength;
import static io.netty.handler.codec.http.HttpResponseStatus.BAD_REQUEST;
import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;

import java.net.InetSocketAddress;
import java.util.logging.Level;
import java.util.logging.Logger;


import com.xcc.core.netty.NettyClient;
import com.xcc.core.netty.manager.ManagerChannel;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
import io.netty.handler.codec.http.websocketx.PingWebSocketFrame;
import io.netty.handler.codec.http.websocketx.PongWebSocketFrame;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import io.netty.handler.codec.http.websocketx.WebSocketFrame;
import io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker;
import io.netty.handler.codec.http.websocketx.WebSocketServerHandshakerFactory;
import io.netty.util.CharsetUtil;

public class WebServerSocketHandler extends SimpleChannelInboundHandler<Object>{

    private static final Logger logger = Logger
        .getLogger(WebServerSocketHandler.class.getName());
    //初始化 部分代码
    
    static NettyClient client;
    int i=0;
    static {
          try {
            client=new NettyClient("127.0.0.1",5555);
            client.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    
    
    
    
    
  //  ZkClient mZkClient=   ZkClientUitl.getClient();

  
    private WebSocketServerHandshaker handshaker;

    
    
    
    
    
    
    
    
    
    
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, Object msg)
        throws Exception {
        // 传统的HTTP接入
        if (msg instanceof FullHttpRequest) {
            handleHttpRequest(ctx, (FullHttpRequest) msg);
        }
        // WebSocket接入
        else if (msg instanceof WebSocketFrame) {
            handleWebSocketFrame(ctx, (WebSocketFrame) msg);
        } 
    }


    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        ctx.flush();
    }

    private void handleHttpRequest(ChannelHandlerContext ctx,
                                   FullHttpRequest req) throws Exception {

        // 如果HTTP解码失败，返回HHTP异常
        System.out.println(req.headers().get("Sec-WebSocket-Key"));
        if (!req.getDecoderResult().isSuccess()
            || (!"websocket".equals(req.headers().get("Upgrade")))) {
            sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1,
                BAD_REQUEST));
            return;
        }

        //构造握手响应返回，本机测试
        WebSocketServerHandshakerFactory wsFactory = new WebSocketServerHandshakerFactory(
            "ws://localhost:5555/websocket", null, false);
        handshaker = wsFactory.newHandshaker(req);
        if (handshaker == null) {
            WebSocketServerHandshakerFactory
            .sendUnsupportedWebSocketVersionResponse(ctx.channel());
        } else {
            handshaker.handshake(ctx.channel(), req);
        }
    }

    private void handleWebSocketFrame(
             ChannelHandlerContext ctx, WebSocketFrame frame) throws  Exception {

        // 判断是否是关闭链路的指令
        if (frame instanceof CloseWebSocketFrame) {
            handshaker.close(ctx.channel(),
                (CloseWebSocketFrame) frame.retain());
            return;
        }
        // 判断是否是Ping消息
        if (frame instanceof PingWebSocketFrame) {
            ctx.channel().write(
                new PongWebSocketFrame(frame.content().retain()));
            return;
        }
        // 本例程仅支持文本消息，不支持二进制消息
        if (!(frame instanceof TextWebSocketFrame)) {
            throw new UnsupportedOperationException(String.format(
                "%s frame types not supported", frame.getClass().getName()));
        }

        // 返回应答消息
       // frame.
        String request = ((TextWebSocketFrame) frame).text();
        if(request.contains("-")) {
            String key=request.substring(0,request.indexOf("-"));
            String content=request.substring(request.lastIndexOf("-")+1);
            System.out.println("key:"+key+"content:"+content);
        }
        
        if (logger.isLoggable(Level.FINE)) {
            logger.fine(String.format("%s received %s", ctx.channel(), request));
        }
        /**
         * RPC 操纵
         * 获取zookeeper 服务端存在值
         * 是否获取到 本机ip+客户端ip
         */
        InetSocketAddress remoteAddress=  
            (InetSocketAddress)ctx.channel().remoteAddress();
        InetSocketAddress localAddress=  
            (InetSocketAddress)ctx.channel().localAddress();
        String remoteIp=remoteAddress.getAddress().getHostAddress();
        String localAddressIp=localAddress.getAddress().getHostAddress();
        
        /*
         * if(!mZkClient.exists("/"+remoteIp+"-"+localAddressIp)) {
         * mZkClient.createEphemeral("/client/"+remoteIp+"-"+localAddressIp); }
         */
        //RPC代码
      
       // ctx.channel().write( new TextWebSocketFrame(request));
         
    }

    private static void sendHttpResponse(ChannelHandlerContext ctx,
                                         FullHttpRequest req, FullHttpResponse res) {
        // 返回应答给客户端
        HttpHeaders mHttpHeaders=  req.headers();
   //    System.out.println( mHttpHeaders);
        if (res.getStatus().code() != 200) {
            ByteBuf buf = Unpooled.copiedBuffer(res.getStatus().toString(),
                CharsetUtil.UTF_8);
            res.content().writeBytes(buf);
            buf.release();
            setContentLength(res, res.content().readableBytes());
        }
    
        // 如果是非Keep-Alive，关闭连接
        ChannelFuture f = ctx.channel().writeAndFlush(res);
        if (!isKeepAlive(req) || res.getStatus().code() != 200) {
            f.addListener(ChannelFutureListener.CLOSE);
        }
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
        throws Exception {
        cause.printStackTrace();
        ctx.close();
    }


}
